Buckle



FIG. 1 is a perspective view of a buckle showing the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a side view of one side thereof, the opposite side being the same as this one side;

FIG. 4 is an end view thereof; and,

FIG. 5 is an opposite end view thereof.

The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a buckle, as shown and described. 